package com.earl.datepickerdialog;

import android.app.DatePickerDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import android.widget.DatePicker;
import android.view.View.OnClickListener;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private TextView showdate;
    private Button setdate;
    private int year;
    private  int month;
    private int day;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        showdate=(TextView)this.findViewById(R.id.showtime);
        setdate=(Button)this.findViewById(R.id.setdate);
        Calendar c=Calendar.getInstance(Locale.CHINA);
        Date mydate=new Date();
        c.setTime(mydate);


        year=c.get(Calendar.YEAR);
        month=c.get(Calendar.MONTH);
        day=c.get(Calendar.DAY_OF_MONTH);
        showdate.setText("当前日期:"+year+"-"+(month+1)+"-"+day);



        setdate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                DatePickerDialog my_datePickerDialog=new DatePickerDialog(MainActivity.this,Datelistener,year,month,day);
                my_datePickerDialog.show();
            }
        });


    }
    private DatePickerDialog.OnDateSetListener Datelistener=new DatePickerDialog.OnDateSetListener()
    {
        Date nowdate=new Date();

        public  void onDateSet(DatePicker v,int y,int m,int d){
            Date date=new  Date((y-1900),m,d);
            if(date.getTime()<nowdate.getTime())
            {
                year=y;
                month=m;
                day=d;
                updateDate();
            }
            else
            {
                Toast.makeText(MainActivity.this,"设置日期无效",Toast.LENGTH_SHORT).show();
            }

        }

        private void updateDate()
        {
            showdate.setText("当前日期"+year+"-"+(month+1)+"-"+day);
        }
    };
}